Machine for use in the manufacture of bobbins for sewing machines



March 30 ,1926. I y H. J'. MARX ET AL ummm:l Fon usE IN 'rua lAUFAcTuREor' oms Fon SEWING MACHINES Filed August 5', V1925 5 vSheets-(Shee'c lwww mw um,

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Mmh 3o, 1926.

1,578,337 H.;J MARX er m. MACHINE FOR USE IN THE MANUFACTURE OF BOBBINSlFOR SEWING MACHINES FiledvAugust 5, 1925 I5 Sheets-Sheet 3 t Y d Cookand Patented Mar. 3i), 1926.

UNITED; STATES .PATENT-10 HENRY J. MARX AND WALTER o. HARVEY, orHoLYoKE, MASSACHUSETTS, Assis-Noris.`

To THE AMERICAN NEW JERSEY..

MACHINE FOR USE IN THE MANUEACTURE oERoBRI'Ns roRsEWINGMACHrNEs'Appiiauon VVfnareageer15,1925! seiiarNo. 48,222'. y

To all whom, t ,may concern?,

Be it known that we, HENRY J. MARX and l/VALTER O. HARVEY, citizens-ofthev United States, both residing at Holyoke, county of Hampden, Stateof Massachusetts, have invented a certainnew anduseful Improvement inMachines for Use in the Manufacture of Bobbins for Sewing Machines, ot

sure on the ends of thread wound on the core' of the bobbin. In pendingapplication Serial N o. 649,212, liled July 3,1923, b'y Curry, Marx, amachine is illustrated and described for cutting pieces from a suitablyformed strip and applying them to the ends of the bobbin core to'formthe flanges of the bobbin. Y

The principal objectfof the present invention is to provide laf'machinewhich is simple in construction, rapid and reliable in operation,andparticularly adapted vfor forming a strip of the character ofthe oneused in the machine of said pending application.

The several features of the invention will be clearly understood fromthe following description. and accompanying drawings, in which, v Figure1 isa front elevation of amachine lembodying the features of theinventionin their preferred form;

Fig. 2'is an enlarged detaill sectional view, taken on the line 2 2 ofFig. 1, showing the operating instrumentalities ofthe machine in theirwork-entgagingposition;

Fig. 3 is a detail bottom plan viewof the parts illustrated in Fig. 2that operate on the top side of the strip; Fig 4 is a sideelevation ofthe same;

Fig.V 5 isa sectional, plan view taken o n theline 5-5 of. Fig. 1;,v I

Fig. 6 is a detail plan View of aportion of a strip after a. partthereof has been acted upon by the machine;

Fig. 7 is a longitudinal Sectional the same; 1 i Fig. 8 is a sectionalview, partly in lelevation and on an enlarged scale, taken on the line8-8 of Fig. '5; and

view of F is detail sectional View taken 'the line 9-'9ofFig.8.`

`.The machine illustrated inA dra-wings isl 1 Pltularly. adapted for usein formingfa series of circular'bumps or embossed porl;

tions 2in a plain iiatstripgaof paper or other librous material,` theSeries' of bumps extending the length of the strip and being equally lspaced, and each bump having aljcentrally located circular aperturel 4'and a'series of slits @about its outermargin. .Thef'blank from whichthis bumped strip is formedis supplied-.to the machine inla roll28which.is

slipped loosely ovenl astudflO projecting from the .end of albracketmember12 secured on the base"r plate 14 offthefmachine. The'supply roll 8 is held on the stud 10between flangesor lSpiders 1 6, theforward one of Y which is detachablyjsecured on the studby l means of athumb screw 18fscrew-.threaded through an aperture in 'the' hub of thespider Y and engaging the stud, this spider being thus removable to:enable a new supply roll 'to be placed in the machine.l The blank strip.i drawn from the Supplyroll is passed beneath a guide pin 20 whichextends between upstanding strip 'guiding llanges 22 onvtheflongitudinal edges of a strip' supporting .table 24. This 'table ismounted for` pivotal adjustment on',v a' bolt; 26 Sexv tending throughapertures in depending lugs V28 on the` under side thereof,

and lugs 3.0 on a bracket member secured' on the base plate .14, thelugs 28 being jarranged-outside of the lugs 30. The table is held inadjusted position by tightening the bolt 26 soV as to clamp the lugs 28on the'table between the'head andnut of the'bolt.' YA

suitable tensionis placed on thestrip as it is drawn over the table 24by meansof a flatv spring 32 having one endsecured on a pin or' rod34extending betweenupstan'ding lugs 36 Yon the table, .and having itsother end curled upwardlyand Vbearing uponthe strip. `I 'heblank strippasses fromthe table through a pair of positively driven feed rolls 88,then over a support 40,1andthen between positively driven` feed rolls42, the completed bumped Strip ,being'then' 'wound uponv al reel 44. Thev,strip v is ,fed inter'- mittentl-y by the two sets offfeed lrolls .yand y42, and during the periods `of rest thereof it is acted upon bysuitable devices herein` Vafter `described toform thelbumps in the stripas-it`passes over thesupport 40. The

feed rolls of eachpair are mounted onl stand-- ardsv46 `securedon thebase 14'.v rldlie lower if'eedir'olls. of :the 'two Vpairs have theirshafts 48 lextending* through Yand journaled in fixed bearings in thestandards 46. The upper feed rolls of the two pairs have the ends oftheir shafts v49-journaled in bearingblocks 50 which are'iiiounted toslide vertically'in suitable vguide-w'ays in the 'standards 46.

v. These rupper feedT rolls are'pressed down- V is `suitablygrip landfeed pair'of feed rollsSS wardly vtocausefthe rollsof each pair to thepaperV strip, by means vof coiled springs '52 acting on the bearingblocks,the tension `of the springs bel ing vadjustable by meansof theusual adjustingscrews ,53. The lower roll of the is provided withflanges 54 f 0i guiding they strip between them, the

r58VVV for the bumps in theV strip.

stripf'fbeing engaged throughout its width meshing gearsl 60l formed ontheir forward ends. The two pairs of feed rolls are driven in. unison toimpart the necessary intermittent feeding movement to the strip throughconnection with the drivin'g Vshaft 62 of the machine.V 'This connectioncomprises a ratchet wheel 64s'ecuredl on the forward end 4of each oftheshafts 48 of the lower vfeed rolls of l the twosets,A anda cooperatingpawlbhav Y ing one endv pivotally mounted on a.v pin or bolt68secured-on the Vupper end of an arm 70 which is 'pivotally mountedupon the asociatedshaft'48. 1 Each pawl 66is provided withy a tooth 7 2which is arranged to `engage the teeth of the'L ratchet wheel, vand is`provided with a weighted extension 7 4 for holdingtlie pawl down uponthe periphery of the ratchet wheel.V The two pawl-carrying arms 70. areconnected so as to move tolgether by means of Ya rod or link 7 6. havingoneend vpivotally mounted upon a pin or screwbolt 78 secured to the pawlcarrying arm 70 associated with the lower feed roll 42, and

v its other end'pivotallymounted on apin or screw bolt 80 secured to thepawl-carrying v.arm 7 0 associated'with the lower feed roll '38. Thepawl-.carrying arms 70 are ractu.-

.ated by means yof'a link or rod 82 having one end pivotally mounted onthe screw bolt 80 and itsfother end pivotally mountedi'on la screwbolt84 secured on the free' end of a L'cani actuated arm 86 having itsother end j pivotally mounted on a screw bolt S8' secured toa standardy90.` The freel end of the cani lever 86is forked to receive a cam roll92V which is mounted on the screw bolt 84 and engages a cam 94 carriedbythe driving shaft 62.

Ving shaft 62.

VvThe cam roll 92 isheld in engagement with the periphery of the cam 94by means of a coiled spring 96'liaving one carrying yarm 70 of the lower'feed rclll 42,v and having its other end. secured toV the standard 90.ith this coiistruction'it will be-fapparent that duringy the rotation ofthe driving shaft 62 the cam 94 will act through vthe cani roll 92 andthe pawl and ratchet connections with thertwo `sets of feed rolls topositively drive the 'feed rolls intermittently, a feeding movement:being iniparted'to the feed rolls during each rotation of thedrivltinay befnoted that thev cam 94 is so constructed as to *impartYquick feeding movements tothe feed rolls with relatively long periods ofrest. Y

The reel 44 upon `whiclrtlie completer bumped strip is wound comprises adrum 100l and two flanges or spiders 102v adjacentV i v opposite ends ofthe drum, the drum Vand the forward spider ,'vbeingfintegral. The drumand spiders are secured on the "rear end of a shaft 104 which extends.through andis journaled iiian elongated bearing seburedto the screwbolt-178 of' tlrepamil` 106 on the end of a bracket arm 108 secured t0the base plate 14. rlhe rearspider 102 is' secured'to the shaft104 bymeans of a thumb screw 108 screw-threaded through the hub of .Ftliespider and engaging the shaft-tliis Y spider being thusremovable so asto permit the bumped stripvroll tobe removed.. A lpulley 1'10 ismouiited'onthe forward end of the reel shaft 104, vaifid 'is' providedvwith y friction clutch faces 112 'on the ends' of .its

hub, The rear rfriction clutch-face1l12 is,

arranged adjacent'a friction clutch face on'.

a collar `115 secured to the reel shaft 104v adjacent the forward endof' the Vbearing106, and the forward friction clutch face 112 is face ona mounted on the shaft 104 between ,thefdisk 116 and adjusting nuts 120screwfhreaded on the end of the shaft, the spring washer vacting toypress the icooperating `friction vdriving belt "122y clutch faces'togetliei-.j n passes over the pulley 1'10Ja`nd a pulley v123 carriedby the driving shaft 62 of thema- YlVith this construction it will'be'apparent that the clutch pulley 11.0 will be rotatedv continuouslythrough .its connection withthe driving shaftr 62 and tliroughthccooperating clutch faces will tend to .drive the reel 44 occurbetween'tlie clutch pulley ,110 and the ree-lshaft dui'ingth'e periodsofVrest of; the strip` feed rolls7 soA that the 'i'eelavill' act to windup thevbumped strip only during the rotation of the feed rolls to thefeed strip. The devices'for formingfthe bumps in the strip comprisetubular-block 124' which 'is arranged'adjacent -a corresponding!'clutchY disk 116. .A spring washer is iio continuously. By suitableadjustnient, however, of the nuts 120, slippage will Lavate? a set in avertical hole in theA strip support 40, the upper' end of the.block-being enlarged to provide a shoulder upon which the block rests.The upper end of the block 7124 Vis provided with a couverWV orbump-forming surface 126. 'The upper` end of the block is furtherprovided Vwith an inner cutting edge` 128 and an outer cutting edge 130.Above the block 124 there is arranged a cooperating bump-forxning die132, apunch 134 for cooperating .with the inner cutting edge 128 on theblock to cnt the central yaperture in the strip, and a cutting die'136for cooperating with the outer cutting edge 130 to out the slitsin thestrip. The forming die 132, the punch 134,l and the slitting die 136 areall rigidly secured on the lower end of a plunger 138 which is mountedfor vertical movement in a tubular bearing 140 having its lower endprovided :with downwardly and outwardly projecting flanges142which aresecured by'bolts 144 to the strip support 40. fThe bump-forming die 132is provided with a tapering shank v146 which is secured in a verticalaperture inthe plunger 138, and with an axial aperture 148 inthe low/erend of which the shank of the punch l134 Vis secured.l vThe slit cuttingdie 136 is in the form of a sleeve which is secured on the projectingend or head ofthe forming die 132, land is provided with downwardly ex`j tending equally l'spaced slit cutting portions 152 corresponding innumber to the number of slits to be cut about'the margin'of the bump inthe strip. A stripping plate 154 is mounted on ,the support 40, and isclamped in position between the top surface ,of the` support and theflanges on the lower end of the plunger bearing 140.- The strip beingacted upon, passes beneath this stripping plate 154 and over the lowerbump'forming die 124, the stripping plate being provided dies work. 1 I

with a hole156 through which the movable i.

' `lVith this construction, during the downward movement of the plunger138 the punch 134 will cooperate with the cutting` edge 128 in the/dieblock 124 to punch the central aperture in the' strip; then the'slitforming die 136 will cooperate with the cutting edge 130 to cut theslits in the strip about the outer margin ofthe bump' tobtformed, andthen'the `bump forming die 4132 will cooperate with the convex'surface126 on *the upper end of the die block 124V to form the bump in thestrip. During the upward movement of the plunger 138-the stripping plate154 will cause the strip to be stripped from the movable dies. Suchoperation of the plunger 138 occurs duringveachi period of rest'ofthestrip feed rollsl n v8, moisture 1s supplied to its under side by and isheldy retracted during eaclrfeeding movement of the feed rolls.

62. vThe connection betwecll the cam 1,58 j

and the plunger carrier coniprises a lever 160 whichisfpivotallly'mounted 'at 162 on the upper end of an upwardly'projectingbracket arm 164 on the tubular bearingr140.

TheV left handarmof thelever 160fcarries a a cam rolll66 that is held inengagementV with the cam 158' by a coiled spring 168 having one `endconnected with an extensioni'() onY the outer end of said lever arm andhaving its otherend secured to fa pin 172fon'the base plate 14'. yTheother end of the lever 160 is received in a depending yoke 174 and isconnected withV the yoke by mea-ns of a.

pivot pin 176 extending through anfap'erture therein and in the arms ofthev yole.v The yoke 174 is provided with 'an'upwardly projecting studorbolt 178 which extends through and is adapted to slidevinan kaperturein a'block 180, An expansion springy 182 is'coiled :about the'stud 178and intervposed between-theblock 180 and a nut `181 screw-threaded onthe upper,y end ofthe y stud. The upward movement yof the stud 178by theaction of'thespring 182 is limited by an adjustable stop screw184'screwthreaded through an aperture in a laterally- Vprojecting lug186 on the bolt, which enrlfhe l block 180 is provided withdiametrically opgages theunderside of the block 180.

posed trunnions 188 that are received. in# bearings inthe upper ends ofa Vyoke 19()v ,to cause the `bump formingr dies to exert the necessarypressure on the work.

, The cam 158 has .a long dwell which holds thebump-*formingdies informing position and is .so constructed with relation to vthe feed rollactuating' cam 94, that thel plunger 138 and tlleoperating devicescarriedvtherestrip only a sutlicient length of time during eachrotation' of the cams' to lpermit Athe Astrip` to be fed, thedevicescarried by the plunger .carrier beingA held in voperative tionof-the machine.

Asthe blank stripy leavesthe supply roll means of ahumidifyi'ng nozzle192. As the stripr passes over the 'v'verln'ngl support 40,

heat is supplied thereto' and the bump-formvby are heldup outfofengagement with the 'i ing dies are heated, by means ofa steam chest 194formed in the ,work support through'which steam iscirculated by means ofsteam pipes 196.

' 'Ithas beenV found that by thus moisten- .ing thestrip a considerabledistance in aldvance of the bump-forming diesand heating tliestrip-asitvpasses over the worksuppoit thestandard 90, and its rear portionextendlis'inounted on Vthe shaft-62 between the cam` Ving throughandjournaled in a bearing in the upper end of a similar standard 198mounted on the base `plate 14. The shaft 62 is diiven through suitablespeed reducing y ,gearing from a driving pulley 200. The plunger carrieropei-ating-cam 158 is loosely mounted on the shaft 62 and the feed-rolloperating Vvcam 94V-is secured byk a set collar 201 on the hub 202of thecam 158. Acliitch collar 204 158 and a collar v206 secured to the shaft.

yThe-clutch collar 204 is caused to rotate con- Vvtinu'ously7 with thershaft by means of a. slid.- ing tongue and slot connection 208 with theiixedcollar 206. The forward side of thev Vclutch collar `204 isprovided with a. tongue 211 which when the clutch .col-lar is shiftedforwardl is caused/toeneao'el a Qro'ection 7 D 2Dv 213 on the hub ofthecam 158 so as to connect the cams 158 and- 94 with thevshaft, and

when the clutch collar is shifted rearwardly isV withdrawn from theslot-soy as to disconnect the Vcams and shaft.

' endpivotally mounted onl the base plate 14,

and .carrying midway of its ends, a clutch shifting` yoke 214'having'diametrically opposed studs or rolls 215 that enteran annular groove`inthe clutch collar. With Vthis construction, the operatorinay byymeans of the clutch lever 210 connect and disconnect the cains 94 and158 from thedi'iving` shaft '62,

Yand'thusthi'ow the strip feeding vdcvites and the plunger '138 intoandfoutjof operation as Asthe driving' pulley 124 for thedesired reel 44is fixed on' the drivingshaft-GQJ, the

slip clutch connection vwill tend to drive the Y y reel-after thel stripfeeding devicesand oper-A ating devices are thrown out of operation asabove described which will ensure the com- 5 f. As will be evidentto`thosesliilled inthe pleted strip being maintained tightly wound on thereel? while said devices are. at rest'.

The-clutch collarr` isadapted'to be thus vshifted by means of a handoperable lever 210 havingy its lowerl art our invention permits variousmodifica- ,tions without departing from VLthe Yspirit thereof or thescope of the appended claims.

l/Vhat we claiin'is:V Y y l l. A machine ofthev class describedfhav`ing, Lin combination, means forintermittently ffeedingastrip, devicesoperable duringl'the periods of restgofsaid feeding meanscoinpifising` apunch, and die "for forming an aperture in the strip and means actingwhile saidlpunch is. inserted through said aperture to form a.ciifcularbumpin thestrip having means for said devices.

'its outer edge arranged substantiallyccncen- Y trically with saidaperture, and actuating 2. A machine of the class'describedhav;

ing, in combination, means for intermittently feeding a strip, devicesvoperable during the periods -ofrestofsaid feeding means to form in thestrip an aperture, a circular series .of slits concentrically of theaperture, and a bump having itslouter edge'defined'by said slits, andactuating means for said devices. l f

8.' A machine of the y'class `described having, iii combination,inean sfor intermittently periods of rest of said feeding means to form in thestrip an aperture, apluralityof slits arranged concentrically about theaperture, and aV bump liavi-ngits outer edge defined substantially bysaid slits, actuating means for said devices, means for moistening thestrip as it isfbeing fed to said devices, and means for heating thestrip as it is being? act-k -ted upon-by said devices.

4. A machine of the class described having, in combination, a supportfor aI strip, means for heating said support, means for intermittentlyfeeding' the f strip over` said support, 'devices operable during the.periods vfeeding;a strip, devices operable during the of rest of saidfeed-ing lmeans to form inv the strip an aperture,slits-arrangedconcentrically with said apertura-and a bump having rits outer edgedefined substantially bysaidV slits, actuating meansforsaiddevices,faiid means for moistening the strip V'as it is :beingfed to said devices.- V5. A-machin'e of theclassdescribed having, incombination, a support vfor aV strip,

a carrier movable toward and from said support, means comprising apunch, a slit cutting die, and ay forming die-for forming :in thestripvduringthe movement o-f the carrier toward said support anaperture, aplurality of slits arianged about the' aperture,

and bump having its ou'tci edge defined substantially by said slits,respectively, and actuating means for said carrier.

ing, in combination, a support fora strip, a carrier inovablo towardvand from said suppont-,means comprising ay slit cutting l,die and G. Amachine ofthe class described havl iie v aforiniiig die mounted on thecarrier to form in the strip, duringpthe movementof the rcarriertowardsaid support,y a; plurality 1 'of slits arranged substantially inva` circle,

and a bump having its outer edgedeiined by said slits, respectively, andactuating means for said carrier. Y

7. A machine of the class described hav-v ing, in combination, aksupport for a strip,

means for intermittently feeding the strip means for said carrier.

S. A machine of the class described'having, in combination, means forintermittently feeding a strip, devices operable during the periods ofrest of said feeding means to form in the strip a plurality of slitsarranged substantially in a circle, and then to'form a bump in the striphaving its edge defined substantially by said slits. 9.A machine of the`class described ha* in@r in combination, a support for a strip,

C7 I v a a carrier movable toward and from said support, devicesrcarried by the carrier and co.

operating devices mounted on said support to form in the strip duringthe movement of the carrier toward said support Van aperture, aplurality of slits arrangedconcentrically about the aperture, and a bumphaving its outer edge defined substantially by said slits,

a spring connected with the carrier, and

means acting through said spring for moving the carrier toward-saidsupport.

10. A machine of the class described have ing, in'combination, a supportover which a strip is adapted to be fed, a carrier mov-I able towardandV from said support, meansV comprising devices carried by the carrierfor forming a bump in the strip, and for cutting slits about the marginof the bump during the movement of the carrier toward vsaid support,feed rolls for feeding nthe stripv `over said support, a drive shaft, acam carried thereby, connections between the cam and feed rolls forimparting a step bystep movement thereto to intermittently feed thevstrip 'over said support, anda second .caml

carried by said drive shaft and suitable connections for actuating saidcarrier to cause said devices to act on the strip Vduring the periods ofrest of the feedingV movement of the strip. f I Y ll. A machine of theclass described having, in combination, a support over which a stripisadapted to be fed, a tubular die block mounted on said support havinga convex vtop surface for engagement with the underside of the strip andhaving circular outer and l inner cutting edges', a carrier movabletoward and from said support, an outwardlyspring` pressed plungermountedv on saidycarrier having a die formed on itsouter end adapted tocooperate withsaid convex` surface to e' forinabump inthe strip duringthemove-v` ment of the carrier towardsaid support, and

a cutting kdie and a punch carried yby Vthe l carrier forfcooperatingwith said cutting edges to act on the strip previously to ltheeffectiveoperation of said bump `'forming die. a a y l2. A machine of the classdescribed having, in, combination, feedY rolls forjfeeding i a` stripintermittently andv acting to hold the strip from movement during the.periods of rest thereof, devices for forming a bump in the strip duringeach period of rest of Athe feeding movement ofthe strip, a roll forwinding up the strip. as it'fleavessaid devices, means comprising a slipclutch connection tending to drive ther'reelrcontinuously to wind up thestrip but incapable of vthus drivingthe reel against the holdingactionof the feed rollsonrthe" strip during the periods of resto-fl thefeeding movements'` of said rolls, and means for throwing saidl feedrolls and said bump forming devices into and out of operationindependently of.

said reel driving means.

13.` A machine of the class described having, in combination, a supportover which a strip is adapted to be fed, a-tubular die block mounted'onsaid supporthaving a curvedtop surface for engagement with one towardand,l from said supporta forming Aside ofthe strip',l and havingcircular outer land inner cutting edges, a carrier movable die, acutting die, and a vpunch 'carried' by(VY the carrier forcooperatingwith said curved' surface and said outer and inner cuttingedges, respectively, to form in, thel strip a bump, an apertureandslits, the aperture being arranged substantially at the center gin ofthe bump, 'feed rolls vfor feeding the strip over said support,a driveshaft, connections between said feed rolls and drive V'of the bump andthe slitsdefiningthe mais y 11oY j shaft to intermittentlly feed thestrip over said support, and-connections between said drive shaft andcarrier for moving the carrier toward said support during the periods ofrest of said stri j In testimony whereof,k we have signed names to thisspecification this lstxday lof* i July, 1925.

HENRY J. MARX f A WALTER o.; i-niiivnr.

